Most recently, he served as senior advisor to Fred Thompson's 2008 presidential campaign.

He served as an adviser to Rudolph Giuliani's 2008 presidential campaign.

Bopp served as an adviser to Mitt Romney's presidential campaign.

He served as a senior advisor to President Bush's 1988 campaign.

Hammond served as the press secretary to Newt Gingrich's 2012 presidential campaign.

In 2004, he served as an advisor to Tony Clement's unsuccessful campaign for the leadership of the new party.

In 2011-12, he served as an informal advisor to Buddy Roemer's presidential campaign.

Greene served as an advisor to Hillary Clinton's 2008 presidential campaign.

Franks served as a consultant to conservative activist Pat Buchanan's presidential campaign.

In 2008, he served as chief strategist to Hillary Clinton's campaign for president.